mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
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#include <iostream>
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#include <cstdio>
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#include <cstdlib>
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#include <cmath>
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#include <cstring>
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#include <algorithm>
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#include <map>
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#define MAXINT 99999999
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#define MININT -1
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using namespace std;
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struct Node{
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int l;
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int w;
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}node[5000+4];
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int vis[5000+4];
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bool cmp(Node x,Node y)
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{if(x.l<y.l)
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return true;
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else if(x.l==y.l)
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{if(x.w<=y.w)
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return true;
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}
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return false;
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}
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int main()
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{
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int n;
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int m;
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int i,j,k;
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scanf("%d",&m);
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while(m--)
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{
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scanf("%d",&n);
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for(i=0;i<n;i++)
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{
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scanf("%d%d",&node[i].l,&node[i].w);
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}
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sort(node,node+n,cmp);
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for(i=0;i<n;i++)
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{vis[i]=0;}
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int countn=0;
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for(i=0;i<n;i++)
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{
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if(vis[i])
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continue;
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vis[i]=1;
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countn++;
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int pre=i;
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for(j=i+1;j<n;j++)
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{
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if(vis[j]==0)
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{
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if(node[j].w>=node[pre].w)
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{vis[j]=1;pre=j;}
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}
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}
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}
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cout<<countn<<endl;
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}
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return 0;
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}
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